Leafy salad vegetables are among the most universally used vegetable crops grown today. Their prominence as important crops has been heightened through the last several decades due to an awareness on the part of consumers of the nutrient, and other obvious values they offer to the diet as "fresh greens" which, at least in the United States, have become a daily table staple. As a result, acreage planted to leafy salad vegetable crops has expanded to a remarkable degree over the past few decades, making these crops an important segment of the agricultural and marketing industries. Published...